So, today i've went back to my Tactics deck, one of the oldest i got from HC. Actually went 4wins out of 4, but i guess i was just lucky i didnt met an Yrden or big unit destroyer.
I also checked the number of Tactics cards available for NG: it's 13 max.
That means players using this leader will use it with either 4,8 or (if they're really crazy) 12 tactic specials. I really like the concept of an ability depending on the starting deck, but it also brings me nightmares from NG Alchemy decks with VW doing 10 damage, i hope this one is more balanced.
Personally i really like Muzzle and Commander's Horn, Garrison is good but makes a unit too vulnerable to destroying/reset (although i also use it, but preferably on R1 where its less risky). Having Muzzle + Skellen + Leader ability will be crazy, stealing so many units from opponent.
(P.S. - i also recommend Johnny and Sara for Tactics decks. They're only 3pt, easily removed, but they're cheap and are great engines when you play many tactics (which are special cards))